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Five cylindrical glass fuses with metal end caps

Bussmann

Bussmann GMD-400-R Glass Fuse 400mA 250V 10kA 125V 20x5mm 5 pack

SKU CH-CYY8-84BF7

Pack of five 20 mm glass time-delay fuses rated 400 mA at 250 V AC with 10 kA interrupt at 125 V AC

  • Time-delay protection handles temporary surges without nuisance blowing
  • 400 mA rating at 250 V AC suits low-current circuits
  • 10 kA interrupt rating at 125 V AC clears high fault currents safely
  • 20 mm × 5 mm glass body fits standard fuse holders
  • Pack of five provides convenient spares for maintenance

Glass Fuse 400mA 250V AC

The EATON BUSSMANN GMD-400-R is a cylindrical glass fuse rated at 400 mA and 250 V AC. It comes in a pack of five and fits holders that accept a 20 mm by 5 mm body. This time-delay device suits low-current circuits in appliances, instrumentation and similar equipment.

Interrupt Rating 100A at 250V AC

The single specification that decides fit is the interrupt rating of 100 A at 250 V AC and 10 kA at 125 V AC. A circuit that can deliver more prospective short-circuit current needs a fuse with a higher breaking capacity. Buyers who need a higher interrupt rating cannot use this part.

Time-Delay Glass Body

The time-delay characteristic lets the fuse tolerate brief inrush currents without opening, while the glass body allows visual inspection of the element. Under sustained overload the element melts to interrupt the circuit. Buyers who need a fast-acting fuse for semiconductor protection cannot use this part.

How it compares

Measured against everything we stock in Breakers & Circuit Protection, at today’s prices. Recalculated every night.

Price $21.99
Cheaper than about 77% of the 1,135 comparable items (median $54.99).

Specifications

Product
Brand nameEATON BUSSMANN

Questions about this item

How does the 400 mA rating behave once the fuse is installed in a circuit?

The fuse carries up to 400 mA continuously and opens with a time-delay characteristic, allowing brief inrush currents without nuisance tripping.

What does the 10 kA interrupt rating at 125 V AC cap in practice?

It means the fuse can safely break fault currents up to 10 kA at 125 V AC without rupturing the glass body.

What physical dimensions must the holder or block accommodate for this 20 mm by 5 mm cylindrical fuse?

The holder needs a 20 mm long by 5 mm diameter cylindrical cavity, matching the standard GMD series footprint.

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